typically the ntsb issuees a preliminary report about ten days after the event. but it'll take about a year to rule of cause of the incident. >> what about the safety record? >> reporter: we do know there were incidents in this area as well as incidents in the past involving metro-north. we know a freight train derailed in july in the same vicinity as this incident that we are seeing today. so investigators, they did say that they are looking to see if there are any similarities there. also, in may, there were two metro-north trains going in separate directions that collided in bridgeport, tommy thompson kt /* /- connecticut. that injured 70. then in the same month having to do with metro-north a track foreman was struck and killed by